GENERA OR FAMILIES. 367 



17. Gentianaceous Plants. Gentian ace^. 



(41) Gentiana — calyx 4-5-cleft ; corolla funnel- or salver-shaped, 



with a 4-5-cleft limb. 



18. Labiate Plants. Labiate. 



(42) Mentha — calyx equal, five-toothed ; corolla with a short 



tube, four-cleft, nearly regular ; stamens four, equal, erect. 



(43) Lamium — calyx bell-shaped, five-toothed; corolla-tube en- 



larged at the throat, the upper lip erect, arched or concave, 

 the lower spreading with a broad middle lobe, and two 

 minute lateral ones ; stamens four, the two lower longest. 



19. Chenopodiaceous Plants. Chenopodiace^. 



(44) Chenopodium — perianth 3-5-parted, persistent, unaltered ; 



stamens five, springing from the receptacle ; stigmas 2-3. 



20. Orchidaceous Plants. ORcniDACEji. 



(45) Spiranthes — sepals coloured, and with the petals converg- 



ing, parallel with the lip ; lip shovel-shaped, unguiculate, 

 with two fleshy projections at the base ; column club- 

 shaped, with two teeth at the apex.' 



21. Liliaceous Plants. Liliace^. 



(4G) Scilla — perianth-segments spreading deciduous ; filaments 

 filiform, smooth, inserted into the base of the perianth. 



22. Melanthaceous Plants. Melanthace^. 



(47) ColchicTim — perianth with a long tube, and a campanulate 

 six-parted limb ; stamens inserted in the orifice of the 

 tube ; capsules three, inflated, erect, united at the base, 

 many-seeded. 



